Speech enhancement by combination of transient emphasis and noise cancelation

Daniel M. Rasetshwane, J. R. Boston, John D. Durrant, Sungyub D. Yoo, Ching Chung Li, Susan Shaiman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

This paper evaluates the effectiveness of combining speech modification techniques that enhance transition components with active noise cancellation to improve the intelligibility of speech in noise. Two speech modification techniques were considered. One is based on wavelet-packet analysis, and the second uses a fixed filter, derived from time-frequency analysis, that emphasizes high frequencies. Active noise cancellation was provided by Bose noise-cancelling headphones. The test noise was real, generated by a ground auxiliary generator on the tarmac at an Air National Guard facility. The test signals were speech tokens from the modified rhyme (psycho-acoustic) test, recorded by a male speaker. This paradigm was used to measure word recognition rates at various signal-to-noise ratios. Active noise cancellation by itself provided over 40% increase in word recognition, while the modified speech and fixed filter techniques alone provided up to 20% improvement, depending on the signal-to-noise ratio. In combination, the speech modification approaches provided over 15% additional improvement in intelligibility over noise cancellation alone.

Original languageEnglish (US)
Title of host publication2011 Digital Signal Processing and Signal Processing Education Meeting, DSP/SPE 2011 - Proceedings
Pages116-121
Number of pages6
DOIs
StatePublished - Apr 21 2011
Event2011 Digital Signal Processing and Signal Processing Education Meeting, DSP/SPE 2011 - Sedona, AZ, United States
Duration: Jan 4 2011Jan 7 2011

Publication series

Name2011 Digital Signal Processing and Signal Processing Education Meeting, DSP/SPE 2011 - Proceedings

Other

Other2011 Digital Signal Processing and Signal Processing Education Meeting, DSP/SPE 2011
CountryUnited States
CitySedona, AZ
Period1/4/111/7/11

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Keywords

  • digital filters
  • speech enhancement
  • speech intelligibility
  • wavelet transforms

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Education

Cite this

Rasetshwane, D. M., Boston, J. R., Durrant, J. D., Yoo, S. D., Li, C. C., & Shaiman, S. (2011). Speech enhancement by combination of transient emphasis and noise cancelation. In 2011 Digital Signal Processing and Signal Processing Education Meeting, DSP/SPE 2011 - Proceedings (pp. 116-121). [5739197] (2011 Digital Signal Processing and Signal Processing Education Meeting, DSP/SPE 2011 - Proceedings). https://doi.org/10.1109/DSP-SPE.2011.5739197